174 replies to this topic

[Crazyfrog (Fab)]

I am so glad I haven't had mine done yet This sounds like great news, I hope the prices are competetive against the old conversion

Good work guys

extra internal work can go £££££
but you may as well do it well no point of cutting corners unless you want to call the aa

Edited by crazyfrog, 05 February 2009 - 10:02 PM.

[Exmantaa]

I just saw the group buy price of the Harrop TVS charger: $1700,- on the CobaltSS forum... Very very tempting....

[Jon]

We are going to run the car later today (first chance we've had) with standard cams, just to see what difference they make. I will post the graphs later. Jon

[siztenboots]

do you run much overlap if any on the cams with a SC , or do you just go for more lift

[MEAGY]

We are going to run the car later today (first chance we've had) with standard cams, just to see what difference they make. I will post the graphs later.

Jon

Don`t tease!!!!!

[Jon]

Okay here is the graph





327BHP 266LBFT

The Comp cams certainly do help! However the standard 2.2 cam profile does give more bottem end torque with an extra 45 lbsft at 2200 rpm. We also hit peak power with the standard cams at about 6850 rpm.

[NickB787]

Amazing the difference the cams make, they will have to go back in ASAP

Edited by NickB777, 06 February 2009 - 05:26 PM.

[NickB787]

How is the fuelling at the moment at idle?

[Jon]

How is the fuelling at the moment at idle?

Better

[NickB787]

How is the fuelling at the moment at idle?

Better

Great

[speedster]

We've been playing with a new Harrup HTV Supercharger. This unit is a direct replacement for the LSJ M62 with an output of 1.3L VS the M62's 1.0L litre.
The engine is a 2.2 with Steel Rods, Deleted Balancer Shafts, Modified Head and Cams, 470cc injectors, complete with an awesome 3" 2bular system the Manifold is a 4 into 1 design with 2" primaries- thanks Jim.




359.93 BHP & 287.35 LBS FT. You can also see that we have not hit peak power, just smacked the limiter set @ 7000rpm!! Yes we were tempted to rev it further but we have maxed the fuel pump, so thought better off it

Now weve got to turn it all down as our brief for the build was 300bhp !! and we are a little over the spec for the pistons!!! Jon

Awesome Jon!
And for me this is right on cue too. After a couple of years procreating and 50k on the cock I'm hoping to (finally) get to my SC build this summer.

From this I'm assuming the Harrup HTV bolts straight onto the M62 manifold. Correct?
I have a SAAB head currently sporting a set of turbo cams plus 8:9:1 Wiseco Pistons and a Eagle 4130 Crankshaft, any idea how these will work with the Harrup output? Can I work towards the 400bhp?

[NickB787]

We've been playing with a new Harrup HTV Supercharger. This unit is a direct replacement for the LSJ M62 with an output of 1.3L VS the M62's 1.0L litre.
The engine is a 2.2 with Steel Rods, Deleted Balancer Shafts, Modified Head and Cams, 470cc injectors, complete with an awesome 3" 2bular system the Manifold is a 4 into 1 design with 2" primaries- thanks Jim.




359.93 BHP & 287.35 LBS FT. You can also see that we have not hit peak power, just smacked the limiter set @ 7000rpm!! Yes we were tempted to rev it further but we have maxed the fuel pump, so thought better off it

Now weve got to turn it all down as our brief for the build was 300bhp !! and we are a little over the spec for the pistons!!! Jon

Awesome Jon!
And for me this is right on cue too. After a couple of years procreating and 50k on the cock I'm hoping to (finally) get to my SC build this summer.

From this I'm assuming the Harrup HTV bolts straight onto the M62 manifold. Correct?
I have a SAAB head currently sporting a set of turbo cams plus 8:9:1 Wiseco Pistons and a Eagle 4130 Crankshaft, any idea how these will work with the Harrup output? Can I work towards the 400bhp?

Yea the Harrop bolts straight on although it uses a 68mm TB the pistons and rods are perfect so no mods there. The head will be good as well as it has stronger valves. Double valve springs with the com S/C cams. Piper are doing a 2.5 exhaust but 3 inch will almost certainly be required for these levels of power. High pressure fuel pump also.

With standard cams we came up with 327bhp so you want the comp ones. It seems a stand alone ECU will be required at the 400bhp mark.

A

[VIX]

I await the price for upgrading my SC Stage 2 to 350bhp with interest!

[Exmantaa]

What pulley size and pressure did you run for this power level?
For sure there is some extra headroom in the Harrop, as the US guys run around 320-340WHP with the standard 2.0LSJ engine.

[NickB787]

What pulley size and pressure did you run for this power level?
For sure there is some extra headroom in the Harrop, as the US guys run around 320-340WHP with the standard 2.0LSJ engine.

I am running the Standard 80mm size but I believe they run them at the 70mm size and below + watermeths Not certain the engine are standard at those BHP

[alanoo]

the stock head is unable to flow enough for these power levels, so there must be at least better valves and certainly cams

[Exmantaa]

the stock head is unable to flow enough for these power levels, so there must be at least better valves and certainly cams

Not sure on the LSJ's flow capability, but the highest TVS I heard of was 347WHP. This was still on standard cams, but uprated springs. Not many US LSJ's run a ported head.
The average TVS power seems to be around 320WHP though. Still enough...

[speedster]

the stock head is unable to flow enough for these power levels, so there must be at least better valves and certainly cams

On FI'd engine, valves with wasted stems might have bigger impact than porting.

[NickB787]

the stock head is unable to flow enough for these power levels, so there must be at least better valves and certainly cams

On FI'd engine, valves with wasted stems might have bigger impact than porting.

Thats a point maybe I should get my spare head put some oversized valves in and see what effect that has, more bhp?

[alanoo]

Not necessarily overisized, but wasted stems